Ignition tester



M. SCHUCH IGNITION TESTER Aug. 11, 1953 Filed Sept. 13, 1952 BEL.L 012 BUZZEJZ 75 Patented Aug. 11, 1953 UNITED smxms Z?ATENT OFFICE 2,64881 IGNITION TESTER Martin SchuchElizbeth, N. J.

Application September 13, 1952, Serial N0. 309,417

Thi invention relates to an igniiaion testen It is an object 0f the present invention 110 pro vide an ignition testet which is readily and easi1y attachsd so the distributor of an auto and. Whi0h by a direcc reading Will enable the user 120 adjust; bis ignition points 130 factory specifications.

Othe1 objects of the present invention are to provide an ignition teste1' bearing the above 0bjects in mind which is cf simple construction, inexpensive to manufacture, has a minirnum number of parts, is easy to use and is efiicient in operation.

For other objects and for a better understanding of the invention, reference may be had to the following detailed description taken in connection -vvith the aceompanying drawing, in which: Fig. 1 is a perspective view of an ignition bester embodying the features cf the present invension and showing the Same in operative use on the distributor f an auto, the alligator clamp leading off 150 a condenser, not shown and Fig. 2 is a side elevational view of a mc' dified form cf the present invention, shown alone Referring now in detai1 130 Fig. 1, and in the practice of my invention there is shown an arenate scale m of plasuic er other suitable material having a substantially V-shaped cut-out H at its inner end and having an integrally formed, downwardly extending fiange E2 aiong said culsout whereby to engage one=half the outer surfaee of a cylindrical member I3 provided at the top of shaft 14 of distributor 55. 'Ihe 1ower edge of the fiange !2 Tests on the nut 45 0f the distributor, the scale Ei) being mainoained in fixed con- 1 tact with the member I2 by means of an Lshaped clamp i'i secured. to ehe upper surface of the sca1e H3 by rivets E8 and having a downwardly bent free end resiliently eng-aging the side of cy1h1- drical member S2. The flange E2 is o1" sufilcient l height 130 support the scale lfl slightly above the rim of the distributor housing !9 for a purpose eo be hereinafter described, the outer ec1ge of the scale terminating slightly within the rim of the 1 housing l.

The ouber upper dge cf the sca1e m is provided with divisions, each division indicating a degree of angular rotation, the divisions being numbered. outwardly from the center of the sca1e substantially as illustrated in Fig 1, and for a 1 Claim. (C1. 324) L-shaped indi-cator 23- being secured to the outer side of th e clamp 22 by; means of a spring memher 24 secured to the base of 17he Socket 20 intermediate the clamp 22 and the socket 20. The vertica1 portion of the indicator 23 extenols above Ehe edge of the housing 19 a sufiicient distance 110 permit the horizontal portion thereof 130 extend inwardly across the scale I0 thereby permitting a direct reading of the divisions provided on the outer edge of .the scale. A contact 25 connects one tearminal cf the socket 26 130 a wire 26 which is in turn connecited. to an alligacor clamp 2'! the alligator clamp 21 being' adapted engage .the

contact terminal of a car condenser, not shown.

of the flange 12 and the clamp I1. In this attached position, the scale vI0 will rotate with the nut H5 and the distributor shaft I 4 due to frietional engagement between the flange I2, the clamp l! and the outer surface of the cylindrical member I3.

The bu1b 2I and the socket 29 a1ong with their associated indicator 23 a1e then secured to the rim of the housing I9 by means 0f the spring c1amp 22, with the indicator 23 resting above the c'zivisions on the scale H3.

The alligator clamp 27 is then connectecl to the contact terminal 0f the car condenser.

With the ignition key of the car turned on the motor is turned manually over, as for instance, by manually rotating the fan of the motor until the bu1b 2I lights up.

At this point, the scale 18 is manually adjusted. angularly relative to the nut I6 and shaft M until the indicator 23 is directly over scale reading corresponcling one-half the number cf degrees in the cam dwell of the distributor. F01 examp1e, if the cam dwel1 of the distributor is 36 degrees, the sca1e HI is rotated relative to the shaft l ana nut !6 unti1 the indicator 23 rests directly above the reading of 18 degrees 0n the scale I0.

The motor is again turned over manually until the bulb 2l goes out. Ab the point of rotation of the shaft 15 and the scale H! at which the bulb 21 goes out, the indicator 25 should again read 18 degrees on the scale w, on the opposite side 0f the zero markim; thereon. If this reading 15 not 18 degrees, 0r identical with the original setting of one half the degrees of the cam dwe1l, it indicates that the igniuion points should be adjusted.

Referring now to Fig. 2, and in the further practice of my invenon, there is -shwn a modified form of the present invention, difiering from Ehe first form in the construction 0f the signal means.

A hell or buzzer 28 now mounted on the clamp 22, one terminal of the hell or buzzer 28 bein grounded through the clamp 22 am]. the housing IQ, Ehe other terminal of the hell or buzzer being connected. to the car condenser by means of the wire 26 and the alligator c1amp 21. v

'Ihe operation df this form of the invention is simi1ar 1;0 the first form except that the sca1e I0 is now sei: to one half the degrees of the :am dwe1l of the distributor when the buzzer or hell rings, and the final reading is haken when the buzzer or hell stops ringing.

In other respects, the form of the invention shown in Fig. 2 is the same as that illustrated in Fig. 1, and like reference nume'rals identify 1ike' parts in each of the views.

It should now be am'aarerit that there has' been provided an ignition tester which is readily and easily attached to the distributo1 of an auto and which by a direct reading will enab1e the user to adjust his ignition points to factory specificati0ns.

While various changes may be made in the detailed construction, it sha1l be understood (hat such changes shall by within the spirit and scope of the present invention as defined by the appended claim.

Having thus Set forth and disclosed ehe nature of my invention, what is claimed is:

In an auto distributor having a central rotatab1e shaft and. Which includes an auto-condenser, a nut secured to said shaft near the top thereof. and a, cylindrical member extending upward from the nut, and. a cylindrical housing surrounding the upper portion of the shaft, an ignition tester comprising an arcuate p1ate, said platze having a circu1ar edge conforming 120 the curvature of the upper rim of the housing and radially disposed side edg'es extending inwardly toward the said distributor shaft, said plate having at its inner end a. substantially V-shaped -4 cut-out surrounding the said cylindrical member on one side thereof and extending into a downwardly extending flange integrally formed with the said platze, the said fiange engaging the said cylindrical member on one side thereof, the lower edge of said flange rescing on the said nut, a substantially L-shapedclamp cf spring metal rigidly secured. to the upper surface cf said plate adjacent the said cut-out, said clamp having a downwardly bent free end resiliently engaging the opposite side of the said cylindrical member, said flange being of sufinfient height support the said plate slightly above the rim cf the distributor and being formed ab substantially right angles thereto whereby to support said plate in substantially horizontal position, a sca1e disposed on the said plate adjacent said outer circular edge, the divisions of the said. sca1e corresponding With degreespf rotaion 0f the said platte and the shaft of the distributor, the said divisions bein'g numbered outwardly from the center of said outer circu1ar edge on each side thereof, a clamp secured to the upper edge of the said cylindrical housing opposite the circular edge of the said. platze, e1ectric signalling means mounted on Ehe said clamp, one terminal of the said signalling means being connected with th e said circular housing and the other terminal of the said signalling means being connected with the said. auto condenser, and. an indicator mounte::1 on the said clamp and extending above and over the scale of the said plate, so that upon turning the said centra1 shaft together Wih the said. plate, the indicator permits reading cf the angular displacement of the said centra1 shaft relative eo the said circular housing.

MARTIN SCI-IUCI-I.

References Cited in the fi1 of this patent UNITED S'IA'IES PATENTS Number Name Dante 2,090020 Ballon Aug. 17, 1937 2,355211 Erickson Aug. 8 1944 

